This method is like `union` except that it accepts `iteratee` which is invoked for each element of each `arrays` to generate the criterion by which uniqueness is computed. Result values are chosen from the first array in which the value occurs. The iteratee is invoked with one argument: (value).
unionBy([2.1], [1.2, 2.3], Math.floor)
// => [2.1, 1.2]| Name | Type | Attribute | Description |
|---|---|---|---|
| arrays | The arrays to inspect. | ||
| iteratee | The iteratee invoked per element. |
{
"comment": "/**\r\n * This method is like `union` except that it accepts `iteratee` which is\r\n * invoked for each element of each `arrays` to generate the criterion by\r\n * which uniqueness is computed. Result values are chosen from the first\r\n * array in which the value occurs. The iteratee is invoked with one argument:\r\n * (value).\r\n *\r\n * @since 4.0.0\r\n * @category Array\r\n * @param {...Array} [arrays] The arrays to inspect.\r\n * @param {Function} iteratee The iteratee invoked per element.\r\n * @returns {Array} Returns the new array of combined values.\r\n * @see difference, union, unionWith, without, xor, xorBy\r\n * @example\r\n *\r\n * unionBy([2.1], [1.2, 2.3], Math.floor)\r\n * // => [2.1, 1.2]\r\n */",
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"description": "This method is like `union` except that it accepts `iteratee` which is\rinvoked for each element of each `arrays` to generate the criterion by\rwhich uniqueness is computed. Result values are chosen from the first\rarray in which the value occurs. The iteratee is invoked with one argument:\r(value).",
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"unionBy([2.1], [1.2, 2.3], Math.floor)\r// => [2.1, 1.2]"
],
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